1. Every year the United States is host to an average of 78,000 foreign high school level students, of which 3,000 are Brazilian.
    美国平均每年要接待78,000名中学学历程度的外国学生，其中3,000个来自巴西。

2. Each week a computer totals the average length of your calls; if it is under 14 minutes, you're in trouble.
    每周，电脑会累计你所接听电话的平均长度；如果不到14分钟，你就有麻烦了。

3. Both the cost and the standard of living were lower before the war.
    战前生活费用和生活水准都比较低.

4. But the claim made by a local authority to recover the cost of salvaging a sunken pie dish must surely be unique.
    但某地当局为打捞一只焙制馅饼的盘子提出索赔，倒是件新鲜的事儿。

5. BellSouth Corporation, with operations in four wireless markets, estimates its annual revenue per average customer at about $2,000 as compared to $860 in the United States.
    在四个无线电话市场有营运点的贝尔南方电话公司估计它的年收入约为平均每个客户2,000美元，与之相比，在美国国内的收入是860美元。

6. Where the cost of government is high, resources for development are correspondingly low.
    凡是政府管理费用高的地方，用于发展国家经济的资金就会相应地减少。

7. The cost amounted to 250.
    费用共达250英镑.

8. The average of 4, 5 and 9 is 6.
    4、5、9三个数的平均数是6.

9. The man was ordered to pay $345 for the cost of the trip. The normal price of a ticket is $230!
    他被罚付三百四十五英镑作为旅费. 而正常的票价则是二百三十英镑！

10. The average output of the factory is 20 cars a day.
    该工厂的平均产量是每天20辆汽车.